Is there a way to write a simple text overlay on all screens, without having to create a widget on each screen?
Check here:
Just use lv_layer_top() as the parent for an object to place it on top of all screens on that display, eg:
lv_obj_t * label = lv_label_create(lv_layer_top());
lv_label_set_text(label, "I'm blocking your screens!");
lv_obj_center(label);
Many Thanks!
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